Installing Flask on Ubuntu 18.04

Flask is a web framework written in Python that allows you to build web applications. It is lightweight and simple to use, making it a popular choice for developers. Here are the steps to install Flask on Ubuntu 18.04:

1. Open the terminal on your Ubuntu system.
2. Ensure that you have Python and pip installed by running the following command:
   sudo apt-get install python3 python3-pip
3. Next, install virtualenv using pip:
   pip3 install virtualenv
4. Create a directory for your Flask application:
   mkdir flask_app
5. Navigate to the newly created directory:
   cd flask_app
6. Create a virtual environment for your Flask application:
   virtualenv venv
7. Activate the virtual environment:
   source venv/bin/activate
8. Now, you can install Flask using pip within the virtual environment:
   pip install Flask

That's it! Flask is now successfully installed on your Ubuntu 18.04 system. You can now start building your Flask applications.

About Flask

Flask is a micro web framework for Python based on the Werkzeug and Jinja2 libraries. It provides a simple and minimalistic approach to building web applications while still being powerful and flexible. Flask follows the model-view-controller (MVC) architectural pattern, making it easy to organize and structure your code.

Some key features of Flask include:

• Routing: Flask provides a built-in routing system to map URLs to functions.
• Templates: It has a templating engine called Jinja2, which allows you to generate dynamic HTML pages.
• HTTP Methods: Flask supports all major HTTP methods like GET, POST, PUT, DELETE, etc.
• Extensions: Flask has a rich ecosystem with many third-party extensions available for various functionalities such as database integration, authentication, and more.
• Testing: It provides a built-in test client for testing your Flask applications.

Overall, Flask is a versatile and powerful web framework that gives you the flexibility to build web applications according to your needs, whether it's a small project or a large-scale application.